Seal



Sept. 15, 19265.

G. w. CHENICEK SEAL,

1186. Nov.

Patented iiept. l5, i925.

ononon w. omronx, or WRITING, INDIANA, ASSIGNOR T or wnrrmo, INDIANA, A CORPORATION on STANDARD OIL COMPANY, INDIANA.

SEAL.

Application filed November 17, 1924. Serial No. 750,325.

To aZZ whom it may concern:

Be it known that I, GEORGE W. CHEN'ICEK, a citizen of the United States, residing at WVhiting, in the county of Lake and State I a of Indiana, have invented a new and useful Improvement in Seals, of which the following is a specification.

lhe presentinvention relates'to improvements in seals or vent valves, more pario ticularly as applied to the vent pipes from the vapor spaces of gasoline storage tanks and storage tanks for like volatile liquids. It will be fully understood from the following description illustrated by the acoompanying drawing, in which:

Figure 1 is a vertical sectional view longitudinally throngha valve or seal construction embodying the present invention;

.Fig. 2 is'a horizontal sectional View on W the line 2-2 of Fig. 1; and I Fig. 3 is a vertical sectional view on the line of Fig. 1. V

The seal of the present invention is an improvement on the construction of the seal shown in the rior application of H. V. Atwell Serial filo. 715,765, filed May 24:, 192%. w

Referring more particularly to the drawings, the numeral 5 indicates a vertical vent pipe section which communicateswith a vent pipe (not shown) from a storage'tanlr,

The vent pipe section 5 is surroundcdby a pan 6 of rectangular horizontal section, with suitable outwardly flaring sides 6*. Two upstanding lugs 7 secured to the top of the vent pipe section 5 carry a horizontal pivot rod 8, upon which is pivoted the inverted rectangular cup 9, the sides ofwhich surround the upper end of the ventv pipe section 5. The inverted. cup 9 is of sufficient depth so that its sides enter a body of liquid suitably maintained in the pan 6. The inverted cup 9 is constructed upon the same principle as shown in the prior application of Atwell previously referred to; that is,,the center of gravity is oti'set with respect to the center of pressure' The portion of the inverted cup on one side of thepivot rod 8 is greater in the area ofits bottom surface than the portion on the other side, the latter being weighted as at 10 to bring the center of gravity directly over the pivot rod 8. With this construction, as is readily apparent,

when the sides of the inverted cup 9 are iminersed in liquid in the pan 6, an excess of pressure within the vent pipe 5 will tend to cause one end of the cup 9 to rise, that end being, inthe form shown in the drawing, the rod 8. When the pressure within the vent pipe 5 is reduced below that of the exterior atmosphere, reverse action takes place, the side of the inverted cup 9 having a larger area being depressed. .In the construction shown, means are illustrated for effectively damping rocking movement-of the inverted cup in its operation.

As shown in the drawings, the ends 10 of the inverted cup 9 which are parallel to the pivot rod 8 are cut away from their; centers to each side as at 11 to'form open-'- ,ings of gradually decreasing area as the endsrespectively descend into the liquid present in the pan 6.- The sides are similarly cut away, as at 11; 1 As a result of this construction, as either end of the pan is forced down into the liquid, a gradually decreas ngaperture for the esca e of air 8 is provided, thereby preventing t e escape of air from within the to by a sudden rush, Withresulting rocking oi the cup.

To further prevent rocking or bobbing of the inverted cup in its operation, and like- 86 wise to control the pressure' under which the cup operates to openthe vent, weights 12 in the form of flat bars'extending across the pan 6, are suspended at their corners: by suitable flexible cords.13 from swivels, 15, which are, in turn, suspended from ad justing screws 16 secured in thetop,of the inverted cup 9 on opposite sides of the pivot 8. The screws 16 are adjusted so that the weights 12. barely rest upon the bottom of the pan 6 when the cup 9 is balanced and level. By suitable adjustment of'the weights 12, the force required to raise either end of the inverted cup 9 may be independently controlled. The weight on the rising side my of the pivot. is liftedand determines the amount of pressure, thaton the descending side resting upon the bottom of the pan 6 and exerting no force in consequence.-

A suitable protecting cover 17 may provided, being supported by lugs 18 on the upApcr edge of the pan 6. I lthough the present invention has been portion on-the right of the pivot 60' described in connection with the ecific' details of a. device for carrying the mvention into effect, it is not intended that these details shall be regarded eat-limitations upon the scope of the invention, except in so far as is suited in the accompanying claims.

I claim:

1. A seal comprising; an open conduit member communicating; with a. vapor space, a pan surrounding said conduit member and adapted to contain a; liquid, an inverted cup over said conduit member and having its sides immersed in the liquid in the pan, said cup having its center of pressure off set from its center of gravity, means for )ivotally supporting said cu at substantially its center of gravity, and at weight members suspended from said cup on each side of its center of gravity, said weights being maintained in a. plane smbetontielly horizontal and touching the bottom of the pan when the cup is substantially level.

2., A seal comprising an open conduit member communicaitin with a. vapor space, a pen surrounding sci conduit member and adapted to contain a liquid, an inverted cup over said conduit member and having its sides immersed in the liquid in the an, said cup having its'center of gravity 0 set from its center of gravity, means for pivotally supporting said cup at substantially its center oi grevity, t1. sup being formed at each end with openings tapered upwardly, fiat weights suspended in a substantially horizontal 'plene from said cup from each side of its center of gravity, and means for adjusting said Weigh-ts so that they touch the bottom of the pan when the cup is substantially level.

GEORGE W. GHENICEK. 

